Often, people create a receive pipeline for each flat file messagetype that must be received. This is done because the flat file disassembler needs to know exactly which document schema is to be used to parse the incoming message, as opposed to the XML disassembler, which will find the schema at runtime. So instead of having several flat file disassemblers in one pipeline, often, many pipelines are created.

BUT, I'd just like to point out that with BizTalk 2006, you can change properties of the pipeline components on a per instance level. So double click on your receive location, click the ellipsis on the pipeline and go to the "DocumentSpecName" property of the flat file disassembler. Why they haven't called it "Document Schema" as it is called in the pipeline designer, I don't know!

Anyway, here you can specify which document schema this pipeline instance should use. You must specify the fully qualified .NET typename of the schema, however. And it is a textbox, not a drop down, as in the designer. You can get the .NET typename by clicking on the .xsd in solution explorer, and taking it from the "Fually Qualified Name" property.

I Found the definition of the record "seqno". It was based on the type "q2:seqnoType".

I found where the "seqnoType" type was declared, and noted that it extended "xs:long".

I changed the type of "seqno" from "q2:seqnoType" to be "xs:long".

I removed the q2 namespace declaration from the seqno element, as it was no longer needed.

I removed the "seqnoType" type declaration, as it was no longer needed.

That's it. Save the XSD and reload it in your schema editor - you will get this:

But it sure would be nice to have the option of just changing it in the properties of an elements in the schema editor...

Hope this helps someone.

EDIT on the 4'th of march 2007: Remember also that the record just below the root node must be set as "maxOccurs=1" instead of unbounded. Otherwise, you can not promote the fields below the record, obviously.

I ran into this issue today. It turned out that the error occured in an expression shape that used xpath to get a value from a message into a variable.

Having been using xpath expressions inside my orchestrations for a long time, I am really not used to having them fail on me And this particular xpath expression was copied from the "Instance XPath" property of the element in the schema editor. So it shouldn't fail. I did add a "[1]" to the xpath because I needed to access the first element of a re-occuring element, but still - not something I hadn't done plenty of times before.

Actually, it took quite some time before I discovered what was wrong. My expression was:

On my current project, I ran into a small issue. In my orchestration, I created a record in a table in a database. The stored procedure that created the record also returned the ID of the record. This ID was to be emailed to a trading partner in the body of an html email. The trading partner could reply, and I needed to correlate on the ID of the record in the database.

But how to do that? The body of the email is one long rawstring with the ID embedded in the HTML.

Off course, there was the obvious way; Just use a property that is never used in some property schema. I happen to know that my solution will never actually use the POP3.Subject property, and therefore I can use it for my purposes. So when I create the Message to be sent out by email to the trading partner, I put the ID inside the POP3.Subject property. When the message is sent, I initialize a correlation set that is based on this single property. I have then also promoted some element of the reply from the trading partner to the same property, and this works just great.

BUT, I am not a fan of misusing properties like that. I find it a bit ugly. So I looked for alternatives, and then I found the /dev/null adapter written by BizTalk MVP Tomas Restrepo. Baiscally, the adapter discards anything it receives. Tomas writes that it can be used to subscribe to anything in order to avoid getting the "No subscribers found" errors, but I found another use for it.

So I created a dummy schema that only had one element in it and promoted that element to a property of my own property schema. I also promoted the appropriate element from the reply from the trading partner to the same property. In my orchestration, I then created a correlation set based on this property, and I added a send port that sends out an instance of the dummy schema just after sending out the email to a port using the /dev/null adapter. The message doesn't go anywhere, but the correlation set gets initialized and I can follow it later on in my orchestration.

Pros and cons... Well, the first obvious solution is much simpler, as it doesn't require a dummy schema, it doesn't require a property schema and the orchestration doesn't need to create and instance of the dummy schema and send it out. On the other hand, it really isn't pretty to use the properties like that.

The second solution requires installing an adapter, registering it, and all the legwork described above. But the solution uses my own properties and the POP3.Subject property can be use later on, should it be necessary.

Oh well, use whichever you like best

Hope this was helpful to someone.

Updated on the 10'th December 2006:

Well, had I taken the time to think it over again before writing the blog entry, I would have realized that my first obvious approach, which is using the POP3.Subject property doesn't actually have to use an existing property in an existing property schema. I could just as easily have created my own property schema and used that instead.

The reason I abandoned this approach was, that after creating the property schema and creating a property inside the property schema, to which I promoted fields in the schemas, I couldn't assign values to it in message assignment shapes. The property just didn't show up using intellisense in the message assignment shapes.

So I went ahead and used the POP3-Subject property instead. BUT, I discovered that I can actually assign values to my own properties. I just need to change a property of the property element in the property schema. The property element needs to be marked as "MessageContextPropertyBase" in the "Property Schema Base" property of the property element in the property schema.

So, I have abandoned the /dev/null adapter, although I liked the idea And am now using my own property. The best of the two worlds!

I have this very weird problem. I have created a functoid, but silly, as I am, I created an icon for it that was way to big. So I wanted to remove the functoid from the toolbox and deploy another functoid instead.

This turned out to be quite a difficult task. I have removed the functoid from GAC and I have removed it from the "Mapper Extensions" folder of the BizTalk installation folder. I have then reset the toolbox. The functoid is STILL there. Actually, I can do whatever I want, even boot the server, but the functoid stays in the toolbox. If I move my mouse over it in the toolbox, VS.NET 2005 will crash very hard, so this isn't desirable If I am very quick, I can go to the functoid, right click on it and delete it from the toolbox. Yiepee, it is gone. BUT, resetting the toolbox makes the functoid reappear :-(

Another guy has the same problem, and at this moment, a support incident with Microsoft is being evaluated. Microsoft have reproduced the behaviour, they claim, so I am awaiting the answer to this peculiar problem any time now.

I will post the solution here, off course.

Update with a solution posted on 9'th December 2006:

Solution 1:

Log on to Windows, using a username other than that, under which this error occurs. The ser must have administrative priviledges.

Right click on "My Computer", Select Properties, Advanced Tab, User Profiles -> Settings and delete the profile that is experiencing the problem.

Logout, and login as the user that had the problem. The problem should now be gone.

This solution has a great drawback, though - the profile is deleted (duh!) This means that alll your settings for all kinds of programs are removed and you need to recreate them. For instance, VS.NET 2005 thinks it is the first time it is started the next time you start it.

Solution 2:

Microsoft stated another solution that should work, but this one I haven't tested:

The first line is a header, with identifier "HH". The last line is the trailer with identifier "TT". In between are many body lines, one per line.

He would like to create schemas for the header, the body and the trailer and use them in a custom receive pipeline, using the flat file disassembler to split it up, so he gets one XML document per body line.

Unfortunately, this doesn't seem to be doable. What seems to happen is that when parsing the document, first the header schema is used. It describes a single line, and this line in the incoming file is then parsed. Then, the body schema is used for parsing the rest of the incoming document. Since the body lines don't have tag identifiers, though, it seems that BizTalk will continue to parse the document, and this includes parsing the last line, which is the trailer. BizTalk doesn't know when to stop parsing for body lines. Therefore, this error appears in the eventlog:

-- BEGIN ERRORSource: "Flat file disassembler" Receive Port: "ReceiveFlatFile" URI: "C:\Projects\BTS 2006\NewsgroupHelp\BodyWithoutTagIdentifierFlatFile\Instances\In\*.txt" Reason: Unexpected data found while looking for:'~'The current definition being parsed is BodyRoot. The stream offset where the error occured is 404. The line number where the error occured is 4. The column where the error occured is 0.-- END ERROR

Baiscally, the flat file disassembler can't find the ~ character on the last line, which isn't supposed to be there, since this line is the trailer. So BizTalk gives up and fails.

What I have come up with isn't actually pretty, but it does seem to work

I have created a schema for the entire flat file. And I have created a schema for the entire flat file without the trailer. Then, I created a schema for the header, and a schema for the body. I have made heavily use of the flat file schema wizard, because there are many elements in the body lines

Then, I created a map between the two main schemas, effectively removing the trailer from the input.

I also created three custom pipelines:

A pipeline for receiving the complete flat file

A pipeline for sending out the flat file without its trailer

A pipeline for splitting the flat file without trailer into several body documents, using the header- and body schemas.

So the solution is:

Let BizTalk read in the complete flat file, and use a map on the receive (or send) port to convert it into the same structure without the trailer. Then output it to a file. Let another receive location pick the new file up, and use the pipeline with body- and header schemas to split it up into several documents.

Pitfalls are: Remember to use different combinations of rootnode and target namespaces for each schema. After copying a schema it is easy to forget to change it. Also, change the .NET typename of the schema after copying it. The compiler will remind you of that if you forget it, though

I really wanted to not use a flat file for the intermediate step and use XML instead, but I couldn't get it to work. I would have to have a schema for the output and another schema for the input, which was an envelope with an "Any"-element inside it, and these two schemas would need to have the same rootnode and target namespace. So I dropped it, and stayed with the flat file, allthough I hated it

I hope this has been of some help. The conclusion basically is that it can't be done, splitting an incoming flat file up using header, body and trailer schemas, if the body doesn't have a tag identifier.

UPDATE on 5'th December 2006: Greg Forsythe has another solution to the problem, which he has written in the newsgroup. I quote:

-- BEGIN QUOTE

There is another way of doing this:Create a document schema with an optional trailer record.This will debatch each record, with the last document having a trailer record. This can be removed/ignored in the first map

-- END QUOTE

I haven't tried it, but it makes sense, and why didn't I think of that?